You can say we own our lives to electromagnetism, without the magnetic field of the Earth, we would all be dead.
The Earth's magnetic field shields the Sun's harmful high energy particles. Without the Earth's magnetic field, the Sun would slowly strip the atmosphere from the earth.
So when I hear about the Earth's magnetic poles reversing or the field getting weaker, this gets my attention.
Sweet,sweet electromagnetism. Any travel to Mars would need this technology.
FEAR! FEAR! FEAR! FEAR! FEAR! FEAR!